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[PATCH 1/6] [media] v4l: mt9t001: constify video_subdev structures

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  [PATCH 1/6] [media] v4l: mt9t001: constify video_subdev structures Julia Lawall <Julia.Lawall@lip6.fr> - 2017-08-08 13:30 +0200
    Re: [PATCH 1/6] [media] v4l: mt9t001: constify video_subdev structures Laurent Pinchart <laurent.pinchart@ideasonboard.com> - 2017-08-09 00:10 +0200

#1706383 — [PATCH 1/6] [media] v4l: mt9t001: constify video_subdev structures

The v4l2_subdev_ops structure is only passed as the third argument of
v4l2_i2c_subdev_init, which is const, so the v4l2_subdev_ops structure
can be const as well.  The other structures are only stored in the
v4l2_subdev_ops structure, all the fields of which are const, so these
structures can also be const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
 drivers/media/i2c/mt9t001.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/media/i2c/mt9t001.c b/drivers/media/i2c/mt9t001.c
index 842017f..9d981d9 100644
--- a/drivers/media/i2c/mt9t001.c
+++ b/drivers/media/i2c/mt9t001.c
@@ -822,15 +822,15 @@ static int mt9t001_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
 	return mt9t001_set_power(subdev, 0);
 }
 
-static struct v4l2_subdev_core_ops mt9t001_subdev_core_ops = {
+static const struct v4l2_subdev_core_ops mt9t001_subdev_core_ops = {
 	.s_power = mt9t001_set_power,
 };
 
-static struct v4l2_subdev_video_ops mt9t001_subdev_video_ops = {
+static const struct v4l2_subdev_video_ops mt9t001_subdev_video_ops = {
 	.s_stream = mt9t001_s_stream,
 };
 
-static struct v4l2_subdev_pad_ops mt9t001_subdev_pad_ops = {
+static const struct v4l2_subdev_pad_ops mt9t001_subdev_pad_ops = {
 	.enum_mbus_code = mt9t001_enum_mbus_code,
 	.enum_frame_size = mt9t001_enum_frame_size,
 	.get_fmt = mt9t001_get_format,
@@ -839,7 +839,7 @@ static int mt9t001_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
 	.set_selection = mt9t001_set_selection,
 };
 
-static struct v4l2_subdev_ops mt9t001_subdev_ops = {
+static const struct v4l2_subdev_ops mt9t001_subdev_ops = {
 	.core = &mt9t001_subdev_core_ops,
 	.video = &mt9t001_subdev_video_ops,
 	.pad = &mt9t001_subdev_pad_ops,

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#1706905

Hi Julia,

Thank you for the patch.

On Tuesday 08 Aug 2017 12:58:27 Julia Lawall wrote:
> The v4l2_subdev_ops structure is only passed as the third argument of
> v4l2_i2c_subdev_init, which is const, so the v4l2_subdev_ops structure
> can be const as well.  The other structures are only stored in the
> v4l2_subdev_ops structure, all the fields of which are const, so these
> structures can also be const.
> 
> Done with the help of Coccinelle.
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
>  drivers/media/i2c/mt9t001.c |    8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/media/i2c/mt9t001.c b/drivers/media/i2c/mt9t001.c
> index 842017f..9d981d9 100644
> --- a/drivers/media/i2c/mt9t001.c
> +++ b/drivers/media/i2c/mt9t001.c
> @@ -822,15 +822,15 @@ static int mt9t001_close(struct v4l2_subdev *subdev,
> struct v4l2_subdev_fh *fh) return mt9t001_set_power(subdev, 0);
>  }
> 
> -static struct v4l2_subdev_core_ops mt9t001_subdev_core_ops = {
> +static const struct v4l2_subdev_core_ops mt9t001_subdev_core_ops = {
>  	.s_power = mt9t001_set_power,
>  };
> 
> -static struct v4l2_subdev_video_ops mt9t001_subdev_video_ops = {
> +static const struct v4l2_subdev_video_ops mt9t001_subdev_video_ops = {
>  	.s_stream = mt9t001_s_stream,
>  };
> 
> -static struct v4l2_subdev_pad_ops mt9t001_subdev_pad_ops = {
> +static const struct v4l2_subdev_pad_ops mt9t001_subdev_pad_ops = {
>  	.enum_mbus_code = mt9t001_enum_mbus_code,
>  	.enum_frame_size = mt9t001_enum_frame_size,
>  	.get_fmt = mt9t001_get_format,
> @@ -839,7 +839,7 @@ static int mt9t001_close(struct v4l2_subdev *subdev,
> struct v4l2_subdev_fh *fh) .set_selection = mt9t001_set_selection,
>  };
> 
> -static struct v4l2_subdev_ops mt9t001_subdev_ops = {
> +static const struct v4l2_subdev_ops mt9t001_subdev_ops = {
>  	.core = &mt9t001_subdev_core_ops,
>  	.video = &mt9t001_subdev_video_ops,
>  	.pad = &mt9t001_subdev_pad_ops,

-- 
Regards,

Laurent Pinchart

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